geoidal


ge·oid

G0092900 (jē′oid′)n. The hypothetical surface of the earth that coincides everywhere with mean sea level.
[German, from Greek geoeidēs, earthlike : gē, earth + -oeidēs, -oid.]
ge·oid′al (-oid′l) adj.

geoidal

(dʒiːˈɔɪdəl) adj (General Physics) relating to a geoid